-/* Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU OpenMP Library (libgomp).
Libgomp is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+ FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
- You should have received a copy of the GNU Lesser General Public License
- along with libgomp; see the file COPYING.LIB. If not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- MA 02110-1301, USA. */
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
-/* As a special exception, if you link this library with other files, some
- of which are compiled with GCC, to produce an executable, this library
- does not by itself cause the resulting executable to be covered by the
- GNU General Public License. This exception does not however invalidate
- any other reasons why the executable file might be covered by the GNU
- General Public License. */
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
/* This file defines the OpenMP internal control variables, and arranges
for them to be initialized from environment variables at startup. */
#endif
unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1;
unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var;
+unsigned long *gomp_nthreads_var_list, gomp_nthreads_var_list_len;
/* Parse the OMP_SCHEDULE environment variable. */
while (isspace ((unsigned char) *env))
++env;
if (*env == '\0')
- return;
+ {
+ gomp_global_icv.run_sched_modifier
+ = gomp_global_icv.run_sched_var != GFS_STATIC;
+ return;
+ }
if (*env++ != ',')
goto unknown;
while (isspace ((unsigned char) *env))
if ((int)value != value)
goto invalid;
+ if (value == 0 && gomp_global_icv.run_sched_var != GFS_STATIC)
+ value = 1;
gomp_global_icv.run_sched_modifier = value;
return;
present and it was successfully parsed. */
static bool
-parse_unsigned_long (const char *name, unsigned long *pvalue)
+parse_unsigned_long (const char *name, unsigned long *pvalue, bool allow_zero)
{
char *env, *end;
unsigned long value;
errno = 0;
value = strtoul (env, &end, 10);
- if (errno || (long) value <= 0)
+ if (errno || (long) value <= 0 - allow_zero)
goto invalid;
while (isspace ((unsigned char) *end))
return false;
}
+/* Parse an unsigned long list environment variable. Return true if one was
+ present and it was successfully parsed. */
+
+static bool
+parse_unsigned_long_list (const char *name, unsigned long *p1stvalue,
+ unsigned long **pvalues,
+ unsigned long *pnvalues)
+{
+ char *env, *end;
+ unsigned long value, *values = NULL;
+
+ env = getenv (name);
+ if (env == NULL)
+ return false;
+
+ while (isspace ((unsigned char) *env))
+ ++env;
+ if (*env == '\0')
+ goto invalid;
+
+ errno = 0;
+ value = strtoul (env, &end, 10);
+ if (errno || (long) value <= 0)
+ goto invalid;
+
+ while (isspace ((unsigned char) *end))
+ ++end;
+ if (*end != '\0')
+ {
+ if (*end == ',')
+ {
+ unsigned long nvalues = 0, nalloced = 0;
+
+ do
+ {
+ env = end + 1;
+ if (nvalues == nalloced)
+ {
+ unsigned long *n;
+ nalloced = nalloced ? nalloced * 2 : 16;
+ n = realloc (values, nalloced * sizeof (unsigned long));
+ if (n == NULL)
+ {
+ free (values);
+ gomp_error ("Out of memory while trying to parse"
+ " environment variable %s", name);
+ return false;
+ }
+ values = n;
+ if (nvalues == 0)
+ values[nvalues++] = value;
+ }
+
+ while (isspace ((unsigned char) *env))
+ ++env;
+ if (*env == '\0')
+ goto invalid;
+
+ errno = 0;
+ value = strtoul (env, &end, 10);
+ if (errno || (long) value <= 0)
+ goto invalid;
+
+ values[nvalues++] = value;
+ while (isspace ((unsigned char) *end))
+ ++end;
+ if (*end == '\0')
+ break;
+ if (*end != ',')
+ goto invalid;
+ }
+ while (1);
+ *p1stvalue = values[0];
+ *pvalues = values;
+ *pnvalues = nvalues;
+ return true;
+ }
+ goto invalid;
+ }
+
+ *p1stvalue = value;
+ return true;
+
+ invalid:
+ free (values);
+ gomp_error ("Invalid value for environment variable %s", name);
+ return false;
+}
+
/* Parse the OMP_STACKSIZE environment varible. Return true if one was
present and it was successfully parsed. */
++end;
if (*end != '\0')
{
- switch (tolower (*end))
+ switch (tolower ((unsigned char) *end))
{
case 'b':
shift = 0;
++end;
if (*end != '\0')
{
- switch (tolower (*end))
+ switch (tolower ((unsigned char) *end))
{
case 'k':
mult = 1000LL;
{
unsigned long stacksize;
int wait_policy;
+ bool bind_var = false;
/* Do a compile time check that mkomp_h.pl did good job. */
omp_check_defines ();
parse_schedule ();
parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var);
parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var);
- parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var);
- parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var);
+ parse_boolean ("OMP_PROC_BIND", &bind_var);
+ parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var,
+ true);
+ parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var, false);
if (gomp_thread_limit_var != ULONG_MAX)
gomp_remaining_threads_count = gomp_thread_limit_var - 1;
#ifndef HAVE_SYNC_BUILTINS
#endif
gomp_init_num_threads ();
gomp_available_cpus = gomp_global_icv.nthreads_var;
- if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var))
+ if (!parse_unsigned_long_list ("OMP_NUM_THREADS",
+ &gomp_global_icv.nthreads_var,
+ &gomp_nthreads_var_list,
+ &gomp_nthreads_var_list_len))
gomp_global_icv.nthreads_var = gomp_available_cpus;
- if (parse_affinity ())
+ if (parse_affinity () || bind_var)
gomp_init_affinity ();
wait_policy = parse_wait_policy ();
if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var))
{
/* Using a rough estimation of 100000 spins per msec,
use 5 min blocking for OMP_WAIT_POLICY=active,
- 200 msec blocking when OMP_WAIT_POLICY is not specificed
+ 3 msec blocking when OMP_WAIT_POLICY is not specificed
and 0 when OMP_WAIT_POLICY=passive.
Depending on the CPU speed, this can be e.g. 5 times longer
or 5 times shorter. */
if (wait_policy > 0)
gomp_spin_count_var = 30000000000LL;
else if (wait_policy < 0)
- gomp_spin_count_var = 20000000LL;
+ gomp_spin_count_var = 300000LL;
}
/* gomp_throttled_spin_count_var is used when there are more libgomp
managed threads than available CPUs. Use very short spinning. */
void
omp_set_max_active_levels (int max_levels)
{
- if (max_levels > 0)
+ if (max_levels >= 0)
gomp_max_active_levels_var = max_levels;
}
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